The problem is belt squeal on a 2002 4.2 windstar. that

The problem is belt squeal on a 2002 4.2 windstar. that stalls the engine on occasion also seems connected to a miss when it squeals.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

I changed the serpentine belt and the tensioner, also the power steering fluid to a straight synthetic, now it squeals just a little at lower rpm but while driving i still noticed a very occasional miss.

Mechanic's Assistant: OK got it. Last thing — JustAnswer charges a fee (generally around $28) to post your type of question to Ford Experts (you only pay if satisfied). There are a couple customers ahead of you. We can help you for less if you're not in a rush. Are you willing to wait a bit?

Yes I just got my hours as a truck driver cut today so less would be great.

The squeal along with the occasional miss is usually a problem with the cam syncro assembly squealing or vibrating, when this happens the cam signal is lost and the computer will shut down for a brief instant causing the miss to occur.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.